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HTML

CSS

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HTML

              
                table
  thead
    tr
      th header1
      th header2
      th header3
      th header4
  tbody
    tr
      td text1
      td text2
      td text3
      td text4
  tbody.extended
    tr
      td text1
      td text2
      td text3
      td text4
    tr
      td(colspan=4)
        div.blocks
          |some blocks
        table.black
          tr
            td btext1
            td btext2
            td btext3
            td btext4
            td btext5
          
        
  tbody
    tr
      td text1
      td text2
      td text3
      td text4
              
            
!

CSS

              
                table {
  width: 500px;
  border-collapse: collapse;
  layout: fixed;
}
thead, tbody {
  position: relative;
}
thead {
  background: #ccc;
}
tbody {
  &.extended {
    position: relative;
    box-shadow: 0 0 3px #ccc;
  }
}
.blocks {
  padding: 10px;
}
.black {
  background: black;
  color: white;
}
              
            
!

JS

              
                
              
            
!
999px

Console